If you're a dog owner, chances are you've wondered at least once or twice why your pooch is so obsessed with other puppies' derrière!

Well now you can finally sleep soundly tonight, because we've got the answer for you right here!

As we all know, dogs have an AMAZING sense of smell! But when they're snout deep in another doggy's rump, they aren't just fulfilling some sort of butt fetish they have!

In fact, dogs have a gland on their backside that gives off an odor that can tell you a LOT about them, like what they've eaten that day and how well their immune system is functioning!

And don't worry, the smell of dog poop wont drown it all out, because your furry friend has a special part of their nose that can hone in on all of the important stuff while blocking out all of the stench!

If you wanna get all of the dirty, scientific details, check out the video (below)!